Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 800ad25..223d617 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -11,7 +11,6 @@
#include <linux/crc32.h>
#include <linux/kernel.h>
#include <linux/initrd.h>
-#include <linux/bootmem.h>
#include <linux/memblock.h>
#include <linux/mutex.h>
#include <linux/of.h>
@@ -25,6 +24,7 @@
#include <linux/debugfs.h>
#include <linux/serial_core.h>
#include <linux/sysfs.h>
+#include <linux/random.h>
#include <asm/setup.h> /* for COMMAND_LINE_SIZE */
#include <asm/page.h>
@@ -39,7 +39,7 @@
* memory entries in the /memory node. This function may be called
* any time after initial_boot_param is set.
*/
-void of_fdt_limit_memory(int limit)
+void __init of_fdt_limit_memory(int limit)
{
int memory;
int len;
@@ -79,57 +79,6 @@
}
}
-/**
- * of_fdt_is_compatible - Return true if given node from the given blob has
- * compat in its compatible list
- * @blob: A device tree blob
- * @node: node to test
- * @compat: compatible string to compare with compatible list.
- *
- * On match, returns a non-zero value with smaller values returned for more
- * specific compatible values.
- */
-static int of_fdt_is_compatible(const void *blob,
- unsigned long node, const char *compat)
-{
- const char *cp;
- int cplen;
- unsigned long l, score = 0;
-
- cp = fdt_getprop(blob, node, "compatible", &cplen);
- if (cp == NULL)
- return 0;
- while (cplen > 0) {
- score++;
- if (of_compat_cmp(cp, compat, strlen(compat)) == 0)
- return score;
- l = strlen(cp) + 1;
- cp += l;
- cplen -= l;
- }
-
- return 0;
-}
-
-/**
- * of_fdt_is_big_endian - Return true if given node needs BE MMIO accesses
- * @blob: A device tree blob
- * @node: node to test
- *
- * Returns true if the node has a "big-endian" property, or if the kernel
- * was compiled for BE *and* the node has a "native-endian" property.
- * Returns false otherwise.
- */
-bool of_fdt_is_big_endian(const void *blob, unsigned long node)
-{
- if (fdt_getprop(blob, node, "big-endian", NULL))
- return true;
- if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) &&
- fdt_getprop(blob, node, "native-endian", NULL))
- return true;
- return false;
-}
-
static bool of_fdt_device_is_available(const void *blob, unsigned long node)
{
const char *status = fdt_getprop(blob, node, "status", NULL);
@@ -143,27 +92,6 @@
return false;
}
-/**
- * of_fdt_match - Return true if node matches a list of compatible values
- */
-int of_fdt_match(const void *blob, unsigned long node,
- const char *const *compat)
-{
- unsigned int tmp, score = 0;
-
- if (!compat)
- return 0;
-
- while (*compat) {
- tmp = of_fdt_is_compatible(blob, node, *compat);
- if (tmp && (score == 0 || (tmp < score)))
- score = tmp;
- compat++;
- }
-
- return score;
-}
-
static void *unflatten_dt_alloc(void **mem, unsigned long size,
unsigned long align)
{
@@ -315,12 +243,8 @@
populate_properties(blob, offset, mem, np, pathp, dryrun);
if (!dryrun) {
np->name = of_get_property(np, "name", NULL);
- np->type = of_get_property(np, "device_type", NULL);
-
if (!np->name)
np->name = "<NULL>";
- if (!np->type)
- np->type = "<NULL>";
}
*pnp = np;
@@ -540,7 +464,7 @@
int __initdata dt_root_addr_cells;
int __initdata dt_root_size_cells;
-void *initial_boot_params;
+void *initial_boot_params __ro_after_init;
#ifdef CONFIG_OF_EARLY_FLATTREE
@@ -556,7 +480,8 @@
phys_addr_t base, size;
int len;
const __be32 *prop;
- int nomap, first = 1;
+ int first = 1;
+ bool nomap;
prop = of_get_flat_dt_prop(node, "reg", &len);
if (!prop)
@@ -671,7 +596,7 @@
fdt_get_mem_rsv(initial_boot_params, n, &base, &size);
if (!size)
break;
- early_init_dt_reserve_memory_arch(base, size, 0);
+ early_init_dt_reserve_memory_arch(base, size, false);
}
of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
@@ -689,7 +614,7 @@
/* Reserve the dtb region */
early_init_dt_reserve_memory_arch(__pa(initial_boot_params),
fdt_totalsize(initial_boot_params),
- 0);
+ false);
}
/**
@@ -763,7 +688,7 @@
* @return offset of the subnode, or -FDT_ERR_NOTFOUND if there is none
*/
-int of_get_flat_dt_subnode_by_name(unsigned long node, const char *uname)
+int __init of_get_flat_dt_subnode_by_name(unsigned long node, const char *uname)
{
return fdt_subnode_offset(initial_boot_params, node, uname);
}
@@ -777,14 +702,6 @@
}
/**
- * of_get_flat_dt_size - Return the total size of the FDT
- */
-int __init of_get_flat_dt_size(void)
-{
- return fdt_totalsize(initial_boot_params);
-}
-
-/**
* of_get_flat_dt_prop - Given a node in the flat blob, return the property ptr
*
* This function can be used within scan_flattened_dt callback to get
@@ -797,6 +714,38 @@
}
/**
+ * of_fdt_is_compatible - Return true if given node from the given blob has
+ * compat in its compatible list
+ * @blob: A device tree blob
+ * @node: node to test
+ * @compat: compatible string to compare with compatible list.
+ *
+ * On match, returns a non-zero value with smaller values returned for more
+ * specific compatible values.
+ */
+static int of_fdt_is_compatible(const void *blob,
+ unsigned long node, const char *compat)
+{
+ const char *cp;
+ int cplen;
+ unsigned long l, score = 0;
+
+ cp = fdt_getprop(blob, node, "compatible", &cplen);
+ if (cp == NULL)
+ return 0;
+ while (cplen > 0) {
+ score++;
+ if (of_compat_cmp(cp, compat, strlen(compat)) == 0)
+ return score;
+ l = strlen(cp) + 1;
+ cp += l;
+ cplen -= l;
+ }
+
+ return 0;
+}
+
+/**
* of_flat_dt_is_compatible - Return true if given node has compat in compatible list
* @node: node to test
* @compat: compatible string to compare with compatible list.
@@ -809,9 +758,21 @@
/**
* of_flat_dt_match - Return true if node matches a list of compatible values
*/
-int __init of_flat_dt_match(unsigned long node, const char *const *compat)
+static int __init of_flat_dt_match(unsigned long node, const char *const *compat)
{
- return of_fdt_match(initial_boot_params, node, compat);
+ unsigned int tmp, score = 0;
+
+ if (!compat)
+ return 0;
+
+ while (*compat) {
+ tmp = of_fdt_is_compatible(initial_boot_params, node, *compat);
+ if (tmp && (score == 0 || (tmp < score)))
+ score = tmp;
+ compat++;
+ }
+
+ return score;
}
/**
@@ -892,15 +853,20 @@
}
#ifdef CONFIG_BLK_DEV_INITRD
-#ifndef __early_init_dt_declare_initrd
static void __early_init_dt_declare_initrd(unsigned long start,
unsigned long end)
{
- initrd_start = (unsigned long)__va(start);
- initrd_end = (unsigned long)__va(end);
- initrd_below_start_ok = 1;
+ /* ARM64 would cause a BUG to occur here when CONFIG_DEBUG_VM is
+ * enabled since __va() is called too early. ARM64 does make use
+ * of phys_initrd_start/phys_initrd_size so we can skip this
+ * conversion.
+ */
+ if (!IS_ENABLED(CONFIG_ARM64)) {
+ initrd_start = (unsigned long)__va(start);
+ initrd_end = (unsigned long)__va(end);
+ initrd_below_start_ok = 1;
+ }
}
-#endif
/**
* early_init_dt_check_for_initrd - Decode initrd location from flat tree
@@ -925,6 +891,8 @@
end = of_read_number(prop, len/4);
__early_init_dt_declare_initrd(start, end);
+ phys_initrd_start = start;
+ phys_initrd_size = end - start;
pr_debug("initrd_start=0x%llx initrd_end=0x%llx\n",
(unsigned long long)start, (unsigned long long)end);
@@ -1077,6 +1045,7 @@
{
int l;
const char *p;
+ const void *rng_seed;
pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
@@ -1089,7 +1058,7 @@
/* Retrieve command line */
p = of_get_flat_dt_prop(node, "bootargs", &l);
if (p != NULL && l > 0)
- strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
+ strlcpy(data, p, min(l, COMMAND_LINE_SIZE));
/*
* CONFIG_CMDLINE is meant to be a default in case nothing else
@@ -1111,11 +1080,22 @@
pr_debug("Command line is: %s\n", (char*)data);
+ rng_seed = of_get_flat_dt_prop(node, "rng-seed", &l);
+ if (rng_seed && l > 0) {
+ add_bootloader_randomness(rng_seed, l);
+
+ /* try to clear seed so it won't be found. */
+ fdt_nop_property(initial_boot_params, node, "rng-seed");
+
+ /* update CRC check value */
+ of_fdt_crc32 = crc32_be(~0, initial_boot_params,
+ fdt_totalsize(initial_boot_params));
+ }
+
/* break now */
return 1;
}
-#ifdef CONFIG_HAVE_MEMBLOCK
#ifndef MIN_MEMBLOCK_ADDR
#define MIN_MEMBLOCK_ADDR __pa(PAGE_OFFSET)
#endif
@@ -1127,12 +1107,13 @@
{
const u64 phys_offset = MIN_MEMBLOCK_ADDR;
+ if (size < PAGE_SIZE - (base & ~PAGE_MASK)) {
+ pr_warn("Ignoring memory block 0x%llx - 0x%llx\n",
+ base, base + size);
+ return;
+ }
+
if (!PAGE_ALIGNED(base)) {
- if (size < PAGE_SIZE - (base & ~PAGE_MASK)) {
- pr_warn("Ignoring memory block 0x%llx - 0x%llx\n",
- base, base + size);
- return;
- }
size -= PAGE_SIZE - (base & ~PAGE_MASK);
base = PAGE_ALIGN(base);
}
@@ -1177,29 +1158,15 @@
return memblock_reserve(base, size);
}
-#else
-void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
-{
- WARN_ON(1);
-}
-
-int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size)
-{
- return -ENOSYS;
-}
-
-int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
- phys_addr_t size, bool nomap)
-{
- pr_err("Reserved memory not supported, ignoring range %pa - %pa%s\n",
- &base, &size, nomap ? " (nomap)" : "");
- return -ENOSYS;
-}
-#endif
-
static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
{
- return memblock_virt_alloc(size, align);
+ void *ptr = memblock_alloc(size, align);
+
+ if (!ptr)
+ panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
+ __func__, size, align);
+
+ return ptr;
}
bool __init early_init_dt_verify(void *params)
@@ -1221,8 +1188,12 @@
void __init early_init_dt_scan_nodes(void)
{
+ int rc = 0;
+
/* Retrieve various information from the /chosen node */
- of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
+ rc = of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
+ if (!rc)
+ pr_warn("No chosen node found, continuing without\n");
/* Initialize {size,address}-cells info */
of_scan_flat_dt(early_init_dt_scan_root, NULL);